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                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/object.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/object.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/object.html" rel="nofollow" target="_blank">../en/object.html</a></div>
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<strong>重要</strong>: 此版本不会发布额外的bug修复或文档更新。最新信息请参考 <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html" rel="nofollow">当前版本文档</a>。
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<h2 class="title">
<a id="object"></a>object(对象)数据类型
</h2>
</div></div></div>

<p>JSON文档本质上是分层的：文档可能包含内部对象，而内部对象本身又可能包含内部对象：</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT my_index/_doc/1
{ <a id="CO308-1"></a><i class="conum" data-value="1"></i>
  "region": "US",
  "manager": { <a id="CO308-2"></a><i class="conum" data-value="2"></i>
    "age":     30,
    "name": { <a id="CO308-3"></a><i class="conum" data-value="3"></i>
      "first": "John",
      "last":  "Smith"
    }
  }
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/675.console"></div>
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<td align="left" valign="top" width="5%">
<p><a href="#CO308-1"><i class="conum" data-value="1"></i></a></p>
</td>
<td align="left" valign="top">
<p>外部文档也是一个JSON对象。</p>
</td>
</tr>
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<p><a href="#CO308-2"><i class="conum" data-value="2"></i></a></p>
</td>
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<p>它包含一个名为<code class="word">manager</code>的内部对象。</p>
</td>
</tr>
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<td align="left" valign="top" width="5%">
<p><a href="#CO308-3"><i class="conum" data-value="3"></i></a></p>
</td>
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<p>它又包含一个名为<code class="word">name</code>的内部对象。</p>
</td>
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<p>在内部，这个文档被索引为一个简单的、扁平的键值对列表，比如下面这样：</p>
<div class="pre_wrapper lang-js">
<pre class="programlisting prettyprint lang-js">{
  "region":             "US",
  "manager.age":        30,
  "manager.name.first": "John",
  "manager.name.last":  "Smith"
}</pre>
</div>
<p>上述文档的显式映射可能像下面这样：</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT my_index
{
  "mappings": {
    "properties": { <a id="CO309-1"></a><i class="conum" data-value="1"></i>
      "region": {
        "type": "keyword"
      },
      "manager": { <a id="CO309-2"></a><i class="conum" data-value="2"></i>
        "properties": {
          "age":  { "type": "integer" },
          "name": { <a id="CO309-3"></a><i class="conum" data-value="3"></i>
            "properties": {
              "first": { "type": "text" },
              "last":  { "type": "text" }
            }
          }
        }
      }
    }
  }
}</pre>
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<div class="console_widget" data-snippet="snippets/676.console"></div>
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<p><a href="#CO309-1"><i class="conum" data-value="1"></i></a></p>
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<p>顶级映射定义中的属性。</p>
</td>
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<p><a href="#CO309-2"><i class="conum" data-value="2"></i></a></p>
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<td align="left" valign="top">
<p>字段<code class="literal">manager</code>是一个内部<code class="literal">object</code>字段。</p>
</td>
</tr>
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<p><a href="#CO309-3"><i class="conum" data-value="3"></i></a></p>
</td>
<td align="left" valign="top">
<p>字段<code class="literal">manager.name</code>是在字段<code class="literal">manager</code>内的一个内部<code class="literal">object</code>字段。</p>
</td>
</tr>
</table>
</div>
<p>不需要将字段<code class="literal">type</code>显式设置为<code class="literal">object</code>，因为这是默认值。</p>
<div class="section">
<div class="titlepage"><div><div>
<h3 class="title">
<a id="object-params"></a><code class="literal">object</code>字段的参数
</h3>
</div></div></div>
<p><code class="literal">object</code>字段接受以下参数：</p>
<div class="informaltable">
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<p>
<a class="xref" href="dynamic.html" title="dynamic"><code class="literal">dynamic</code></a>
</p>
</td>
<td valign="top">
<p>
是否应该将新属性(<code class="literal">properties</code>)动态添加到现有对象中。

接受<code class="literal">true</code>(默认)、<code class="literal">false</code>和<code class="literal">strict</code>。
</p>
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<p>
<a class="xref" href="enabled.html" title="enabled"><code class="literal">enabled</code></a>
</p>
</td>
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<p>
为对象字段提供的 JSON 值是应该被解析和索引(<code class="literal">true</code>，默认值)，还是完全忽略(<code class="literal">false</code>)。
</p>
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<p>
<a class="xref" href="properties.html" title="properties"><code class="literal">properties</code></a>
</p>
</td>
<td valign="top">
<p>
对象中的字段，可以是任何数据类型(<a class="xref" href="mapping-types.html" title="字段数据类型">datatype</a>)，包括<code class="literal">object</code>。

可以向现有对象添加新属性。
</p>
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<div class="important admon">
<div class="icon"></div>
<div class="admon_content">
<p>如果需要索引对象数组而不是单个对象，请先阅读<a class="xref" href="nested.html" title="nested 数据类型">嵌套(nested)数据类型</a>。</p>
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